Muffler for gas engines



Feb. 27, 1923.

J. H- B. REA.

MUFFLER FOR GAS ENGINES.

FILED JUNE 23,1921.

J. H.B. Real m J Va flbtow a; o

Patented Feb. 27, 1923.

Joann. arm, or LA 'rarmngenonera.

MUFFLER FOR GAS ENGINE.

Application filed June 23, 1921.

To all whom it may concern Be it known that I, JOHN H. B. REA, a citizen of the United States, residing at La Fayette, in the county of Walker and State of Georgia, have invented certain new and useful Improvements in Mufliers for Gas Engines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improved muiiler for explosive engines, and it is the principal object of the invention to so construct the same that it will practically eliminate all undesirable noises caused from the explosions occurring in the engine cylinders due to the peculiar construction which causes the escaping gases to take an extremely free but tortuous passage through this muffler.

Another object of the invention is to generally improve upon devices of this class by the provision of one of extreme simplicity and durability which is composed of ready marked parts, including ordinary pipes, fittings and couplings, all of the parts being connected together in such a way that they can be easily and readily separated for making repairs and cleaning.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same:

Figure 1 is a side elevational view of a mufller constructed in accordance with this invention.

Figure 2 is a central longitudinal sectional view through the same.

In carrying out the invention, I make use of a. relatively large pipe section 1 which is externally screw-threaded at opposite ends to permit reducer couplings 2 to be attached thereto. Screwed into these couplings are nipples 3 and screwed into these nipples are. pipes at and 5 which are considerably smaller in diameter than the first named pipe 1. Pipe 4; as will be seen leads from the exhaust. manifold on the engine while pipe 5 extends into the large pipe 1 and has its inner open end closed by an ordinary screw-cap 6. It may be pointed out Serial No. 479,816.

that this pipe 5 is provided with a plurality of openings 7 to permit the gases to enter the same as will be seen later. Also thread ed onto the screw-threaded inner end of this pipe 5 is a substantially conical coupling 8 which together with the cap 6 provides a way of deflecting the entering gases and causing them to be evenly distributed throughout the entire area of the mufller. This last named coupling 8 carries a short length of pipe 9 which terminates adjacent one end of the pipe 1 and is sufiiciently large to surround the pipe 5 and provide a space between these pipes to permit the gases to take the course of the arrows, that is, to

permit the gases to pass through the pipe 1 and between the pipes 5 and 9 and into the former through the aforesaid openings 7. The pipe 5 if desired may be extended beyond the nipples 3 to permit acoupling 10 to be connected thereto, this coupling being in turn connected with a pipe 11 which leads to the rear end of the machine in the usual way.

In operation, the gases from the exhaust manifold pass throug the pipe 4 into the adjacent end of the mufller. Upon entering the latter, they strike the cap 6 and deflector coupling 8 and are caused to be evenly dis tributed throughout the entire area of the mufiler. The pressure of the incoming gases causes the gases then in the mufiler to pass between the pipes 9 and 5 and finally into the latter through the openings 7. It is then obvious that they pass from this pipe 5 into the pipe 11 where they are permitted to escape into the atmosphere in the usual way.

By carefully considering the description in connection with the drawing, persons familiar with devices of this class will doubtless be able to obtain a clear understanding or this invention. It is therefore thought unnecessary to describe the same in more detail or enter a more lengthy description.

The form of the invention herein shown and described is preferred, yet, it is to be understood that within the scope of the subjoined claim, slight changes may be resorted to if desired.

I claim:

A muffler for explosive engines comprising a comparatively large pipe externally screw-tln'eaded at its opposite ends, reducercouplings threaded on said ends, nipples lOS tech-ably connected with said other coupling, surrounding and spaced from said small pipe and extending into close proximity to one of the aforesaid reducer couplings.

In testimony Whereoi 1 have hereunto set my hand.

JUHN H. B. REA. 

